1. in an ecosystem, there are many factors that affect how many organisms can survive there. which of the following is one of those factors?
a. availability of water
b. number of times humans have seen the area
c. color of flowering plants
d. age of mammal species
this is study island.

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?